1 files changed, 97 insertions, 3 deletions

diff --git a/drivers/hid/wacom_wac.c b/drivers/hid/wacom_wac.c
index 71646b311867..fa16a5bf3df3 100644
--- a/drivers/hid/wacom_wac.c
+++ b/drivers/hid/wacom_wac.c
@@ -25,11 +25,18 @@
 #define WACOM_INTUOS_RES        100
 #define WACOM_INTUOS3_RES       200
 
-/* Scale factor relating reported contact size to logical contact area.
+/*
+ * Scale factor relating reported contact size to logical contact area.
  * 2^14/pi is a good approximation on Intuos5 and 3rd-gen Bamboo
  */
 #define WACOM_CONTACT_AREA_SCALE 2607
 
+/*
+ * Percent of battery capacity for Graphire.
+ * 8th value means AC online and show 100% capacity.
+ */
+static unsigned short batcap_gr[8] = { 1, 15, 25, 35, 50, 70, 100, 100 };
+
 static int wacom_penpartner_irq(struct wacom_wac *wacom)
 {
         unsigned char *data = wacom->data;
@@ -263,11 +270,19 @@ static int wacom_graphire_irq(struct wacom_wac *wacom)
         unsigned char *data = wacom->data;
         struct input_dev *input = wacom->input;
         struct input_dev *pad_input = wacom->pad_input;
+        int battery_capacity, ps_connected;
         int prox;
         int rw = 0;
         int retval = 0;
 
-        if (data[0] != WACOM_REPORT_PENABLED) {
+        if (features->type == GRAPHIRE_BT) {
+                if (data[0] != WACOM_REPORT_PENABLED_BT) {
+                        dev_dbg(input->dev.parent,
+                                "%s: received unknown report #%d\n", __func__,
+                                data[0]);
+                        goto exit;
+                }
+        } else if (data[0] != WACOM_REPORT_PENABLED) {
                 dev_dbg(input->dev.parent,
                         "%s: received unknown report #%d\n", __func__, data[0]);
                 goto exit;
@@ -301,7 +316,12 @@ static int wacom_graphire_irq(struct wacom_wac *wacom)
                 input_report_abs(input, ABS_X, le16_to_cpup((__le16 *)&data[2]));
                 input_report_abs(input, ABS_Y, le16_to_cpup((__le16 *)&data[4]));
                 if (wacom->tool[0] != BTN_TOOL_MOUSE) {
-                        input_report_abs(input, ABS_PRESSURE, data[6] | ((data[7] & 0x03) << 8));
+                        if (features->type == GRAPHIRE_BT)
+                                input_report_abs(input, ABS_PRESSURE, data[6] |
+                                        (((__u16) (data[1] & 0x08)) << 5));
+                        else
+                                input_report_abs(input, ABS_PRESSURE, data[6] |
+                                        ((data[7] & 0x03) << 8));
                         input_report_key(input, BTN_TOUCH, data[1] & 0x01);
                         input_report_key(input, BTN_STYLUS, data[1] & 0x02);
                         input_report_key(input, BTN_STYLUS2, data[1] & 0x04);
@@ -312,6 +332,20 @@ static int wacom_graphire_irq(struct wacom_wac *wacom)
                                         features->type == WACOM_MO) {
                                 input_report_abs(input, ABS_DISTANCE, data[6] & 0x3f);
                                 rw = (data[7] & 0x04) - (data[7] & 0x03);
+                        } else if (features->type == GRAPHIRE_BT) {
+                                /* Compute distance between mouse and tablet */
+                                rw = 44 - (data[6] >> 2);
+                                rw = clamp_val(rw, 0, 31);
+                                input_report_abs(input, ABS_DISTANCE, rw);
+                                if (((data[1] >> 5) & 3) == 2) {
+                                        /* Mouse with wheel */
+                                        input_report_key(input, BTN_MIDDLE,
+                                                        data[1] & 0x04);
+                                        rw = (data[6] & 0x01) ? -1 :
+                                                (data[6] & 0x02) ? 1 : 0;
+                                } else {
+                                        rw = 0;
+                                }
                         } else {
                                 input_report_abs(input, ABS_DISTANCE, data[7] & 0x3f);
                                 rw = -(signed char)data[6];
@@ -358,6 +392,31 @@ static int wacom_graphire_irq(struct wacom_wac *wacom)
                         retval = 1;
                 }
                 break;
+        case GRAPHIRE_BT:
+                prox = data[7] & 0x03;
+                if (prox || wacom->id[1]) {
+                        wacom->id[1] = PAD_DEVICE_ID;
+                        input_report_key(pad_input, BTN_0, (data[7] & 0x02));
+                        input_report_key(pad_input, BTN_1, (data[7] & 0x01));
+                        if (!prox)
+                                wacom->id[1] = 0;
+                        input_report_abs(pad_input, ABS_MISC, wacom->id[1]);
+                        retval = 1;
+                }
+                break;
+        }
+
+        /* Store current battery capacity and power supply state */
+        if (features->type == GRAPHIRE_BT) {
+                rw = (data[7] >> 2 & 0x07);
+                battery_capacity = batcap_gr[rw];
+                ps_connected = rw == 7;
+                if ((wacom->battery_capacity != battery_capacity) ||
+                    (wacom->ps_connected != ps_connected)) {
+                        wacom->battery_capacity = battery_capacity;
+                        wacom->ps_connected = ps_connected;
+                        wacom_notify_battery(wacom);
+                }
         }
 exit:
         return retval;
@@ -1418,6 +1477,7 @@ void wacom_wac_irq(struct wacom_wac *wacom_wac, size_t len)
 
         case WACOM_G4:
         case GRAPHIRE:
+        case GRAPHIRE_BT:
         case WACOM_MO:
                 sync = wacom_graphire_irq(wacom_wac);
                 break;
@@ -1654,6 +1714,27 @@ int wacom_setup_input_capabilities(struct input_dev *input_dev,
                 __set_bit(INPUT_PROP_POINTER, input_dev->propbit);
                 break;
 
+        case GRAPHIRE_BT:
+                __clear_bit(ABS_MISC, input_dev->absbit);
+                input_set_abs_params(input_dev, ABS_DISTANCE, 0,
+                                              features->distance_max,
+                                              0, 0);
+
+                input_set_capability(input_dev, EV_REL, REL_WHEEL);
+
+                __set_bit(BTN_LEFT, input_dev->keybit);
+                __set_bit(BTN_RIGHT, input_dev->keybit);
+                __set_bit(BTN_MIDDLE, input_dev->keybit);
+
+                __set_bit(BTN_TOOL_RUBBER, input_dev->keybit);
+                __set_bit(BTN_TOOL_PEN, input_dev->keybit);
+                __set_bit(BTN_TOOL_MOUSE, input_dev->keybit);
+                __set_bit(BTN_STYLUS, input_dev->keybit);
+                __set_bit(BTN_STYLUS2, input_dev->keybit);
+
+                __set_bit(INPUT_PROP_POINTER, input_dev->propbit);
+                break;
+
         case WACOM_24HD:
                 input_set_abs_params(input_dev, ABS_Z, -900, 899, 0, 0);
                 input_set_abs_params(input_dev, ABS_THROTTLE, 0, 71, 0, 0);
@@ -1862,6 +1943,11 @@ int wacom_setup_pad_input_capabilities(struct input_dev *input_dev,
         input_set_abs_params(input_dev, ABS_Y, 0, 1, 0, 0);
 
         switch (features->type) {
+        case GRAPHIRE_BT:
+                __set_bit(BTN_0, input_dev->keybit);
+                __set_bit(BTN_1, input_dev->keybit);
+                break;
+
         case WACOM_MO:
                 __set_bit(BTN_BACK, input_dev->keybit);
                 __set_bit(BTN_LEFT, input_dev->keybit);
@@ -2031,6 +2117,9 @@ static const struct wacom_features wacom_features_0x00 =
 static const struct wacom_features wacom_features_0x10 =
         { "Wacom Graphire", 10206, 7422, 511, 63,
           GRAPHIRE, WACOM_GRAPHIRE_RES, WACOM_GRAPHIRE_RES };
+static const struct wacom_features wacom_features_0x81 =
+        { "Wacom Graphire BT", 16704, 12064, 511, 32,
+          GRAPHIRE_BT, WACOM_GRAPHIRE_RES, WACOM_GRAPHIRE_RES };
 static const struct wacom_features wacom_features_0x11 =
         { "Wacom Graphire2 4x5", 10206, 7422, 511, 63,
           GRAPHIRE, WACOM_GRAPHIRE_RES, WACOM_GRAPHIRE_RES };
@@ -2429,6 +2518,10 @@ static const struct wacom_features wacom_features_0x309 =
         HID_DEVICE(BUS_USB, HID_GROUP_WACOM, USB_VENDOR_ID_WACOM, prod),\
         .driver_data = (kernel_ulong_t)&wacom_features_##prod
 
+#define BT_DEVICE_WACOM(prod)                                           \
+        HID_DEVICE(BUS_BLUETOOTH, HID_GROUP_WACOM, USB_VENDOR_ID_WACOM, prod),\
+        .driver_data = (kernel_ulong_t)&wacom_features_##prod
+
 #define USB_DEVICE_LENOVO(prod)                                 \
         HID_USB_DEVICE(USB_VENDOR_ID_LENOVO, prod),                     \
         .driver_data = (kernel_ulong_t)&wacom_features_##prod
@@ -2486,6 +2579,7 @@ const struct hid_device_id wacom_ids[] = {
         { USB_DEVICE_WACOM(0x69) },
         { USB_DEVICE_WACOM(0x6A) },
         { USB_DEVICE_WACOM(0x6B) },
+        { BT_DEVICE_WACOM(0x81) },
         { USB_DEVICE_WACOM(0x84) },
         { USB_DEVICE_WACOM(0x90) },
         { USB_DEVICE_WACOM(0x93) },